IIS: All the intended purposes of the certificate could not be verified

When viewing a Thawte certificate in Microsoft IIS tool (MMC), a window indicates "All the intended purposes of the certificate could not be verified ".

It is not an error, only an informative note. The tool just did not understand the intended purpose of the certificate. It does not matter as it does not influence the certificate functioning.

You'll have to ignore this message for there is no way to make it disappear.